Given:-
The mean of 40,50 and 90 is P. If the mean of 40,50,90 and P is Q.
To find:-
The value of Q.
So now the mean of 40,50 and 90 is P. so we get,
![(40+50+90)/(3)=(180)/(3)=60](https://img.qammunity.org/2023/formulas/mathematics/college/8tattkezgbcgwzdz57dty659n2sfuo7e4v.png)
So the value of p is 60.
Also we have the mean of 40,50,90 and P is Q. so we get,
![(40+50+90+60)/(4)=(240)/(4)=60](https://img.qammunity.org/2023/formulas/mathematics/college/sn8js2kqwiyyesfdnej57jwhdklqd6cz1d.png)
So the value of q is 60.